Refuse-burner.



F. F. HOPKINS.

REFUSE BURNER.

APPLICATION FILED Nov. II. 1916.

Patented Mar. 27, 1917.

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lmlmenm" mnh F. F. HOPKINS.

REFUSE BURNER.

APPLICATION FILED NOV. 8. 19I6.

1,2034@ l Patented Mar. 27, 1917.

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memur .FRANK F. HOPKINS, F SEATTLE, WASHINGTON.

REFUSE-BURNER.

Specification of Letters Patent.

Patented llllar. 27, 1917.

Application nica November 8, 1916. Serial No. 130,144.

To all whom it may concern:

Be it lnown that I, FRANK F. HOPKINS, a citizen of the United States, and resident of the city of Seattle, county of King, and State of Washington, have invented certain new and useful improvements in Refuse-Burners, of which the following is a specilication.

My invention relates to refuse burners and consists of a refuse burner intended more particularly for use in disposing of mill waste.

rlhe object of my invention is to produce a burner of this sort which shall be cheap in construction and which shall also be durable and effective in its action.

ln carrying out my invention l employ a frusto-conical shell -tapering upwardly within which the refuse is deposited for combustion and provide means for admitting a large quantity of air to the base of said cone so that it will travel upward between the lire and the wall of the shell, therebymaintaining the wall cooler than otherwise.

The accompanying drawings show a. preferred forni of construction for this device.

Figure l is an elevation of the device with a portion of the wall broken away to show the interior construction.

Fig. 2 is a plan view of the same with a portion of the wall of the shell broken away.

Fig. 3 is a detail showing a sectional elevation through one side of the burner along the line of one of the air inlet channels communicating with the grate.

The conical shell is preferably made by using rolled iron shapes, such for instance, as angles, channels or ll-beams, to formlongitudinal ribs l. To the inner surfaces of these ribs iron plates are secured to form the shell 2. The lowermost of these plates are placed so that their lower edges are raised quite a little above the ground, or the surface upon which the material is burned. This is clearly shown in Fig. 1, wherein the lower edge of these plates is shown at 20. rlhe upper end of the cone is covered by a screened dome 3 which prevents the passage of sparks. The cone does not extend to a point, but has the upper end cut off, so that the shape of the device is a frustum of a cone. The refuse to be burnt may be supplied thereto in any suitable manner. I have shown the end of a conveyer chute 5 as entering the upper part of the shell.

Air for combustion is supplied through conduits 4:0, which pass beneath the base of the burner and connect with grates t which are disposed about the floor of the burner. l have herein indicated four such grates. rlFhe conduits 40 extend outwardly and communicate with the free air outside of the burner.

Encircling the base of the conical shell is a wall 6, preferably of masonry, although this is not material. This wall is spaced outwardly from the lower edge of the shell so as to provide an annular opening through which air may pass in a considerable volume beneath the baseof the cone. rlhe upper edge of the encircling wall 6, preferably rises well above the lower edge 20 of the conical shell, as is clearly shown in Fig. 1. This wall protects the interior of the burner from heavy blasts of air which, if the wall were not present, might blow sparks or coal out at the base.

By this construction a large volume of air is passed upward through the burner and ad] acent the outer` walls, thus forming a layer of cooler air which envelops the hot gases of combustion. As a result the effect of the heat upon the outer shell is minimized and its life increased. The encircling wall 6 protects against blasts of air and the wind and contributes to safety and prevention of tires.

What ll claim as my invention is:

1. A refuse burner comprising a shell having an upwardly converging wall supported with its bottom elevated above the ground and an encircling wall spaced outwardly from the base of the shell and rising to an elevation higher than the lower edge of the shell wall.

2. A refuse burner comprising a shell having its wall converging upwardly and at the base elevated to form a draft inlet extending about its base, an encircling wall spaced outwardly from the base of the said shell and rising to a height above that of the lower edge of the wall of the shell and draft conduits extending beneath the walls and opening at points intermediate the center and the base of the shell.

.3. A refuse burner comprising a shell having its Wall converging upwardly and at the base elevated to form a draftV inlet extending about its base, an encircling Wall spaced outwardly from the base of the said shell' and rising to a height above that of the lowerY edge of the Wall of the shell, the floor Within said shell having a plurality of grates spaced Vbetween the center and the shell and a con- FRANK F. HOPKINS.

` Copies of'this patent may be obtained for ve centsv each, by addressing the Commissioner of Patents,

Washington, D. C. 

